<?php

/**
 * Title         : Aqua Resizer
 * Description   : Resizes WordPress images on the fly
 * Version       : 1.1.7
 * Author        : Syamil MJ
 * Author URI    : http://aquagraphite.com
 * License       : WTFPL - http://sam.zoy.org/wtfpl/
 * Documentation : https://github.com/sy4mil/Aqua-Resizer/
 *
 * @param string $url    - (required) must be uploaded using wp media uploader
 * @param int $width  - (required)
 * @param int $height - (optional)
 * @param bool $crop   - (optional) default to soft crop
 * @param bool $single - (optional) returns an array if false
 * @uses  wp_upload_dir()
 * @uses  image_resize_dimensions() | image_resize()
 * @uses  wp_get_image_editor()
 *
 * @return str|array
 */

if (!function_exists('aq_resize')) {
    function aq_resize($url, $width = null, $height = null, $crop = null, $single = true, $upscale = false)
    {

        // Validate inputs.
        if (!$url || (!$width && !$height)) return false;

        // Caipt'n, ready to hook.
        if (true === $upscale) add_filter('image_resize_dimensions', 'aq_upscale', 10, 6);

        // Define upload path & dir.
        $upload_info = wp_upload_dir();
        $upload_dir = $upload_info['basedir'];
        $upload_url = $upload_info['baseurl'];

        $http_prefix = "http://";
        $https_prefix = "https://";

        /* if the $url scheme differs from $upload_url scheme, make them match
           if the schemes differe, images don't show up. */
        if (!strncmp($url, $https_prefix, strlen($https_prefix))) { //if url begins with https:// make $upload_url begin with https:// as well
            $upload_url = str_replace($http_prefix, $https_prefix, $upload_url);
        } elseif (!strncmp($url, $http_prefix, strlen($http_prefix))) { //if url begins with http:// make $upload_url begin with http:// as well
            $upload_url = str_replace($https_prefix, $http_prefix, $upload_url);
        }


        // Check if $img_url is local.
        if (false === strpos($url, $upload_url)) return false;

        // Define path of image.
        $rel_path = str_replace($upload_url, '', $url);
        $img_path = $upload_dir . $rel_path;

        // Check if img path exists, and is an image indeed.
        if (!file_exists($img_path) or !getimagesize($img_path)) return false;

        // Get image info.
        $info = pathinfo($img_path);
        $ext = $info['extension'];
        list($orig_w, $orig_h) = getimagesize($img_path);

        // Get image size after cropping.
        $dims = image_resize_dimensions($orig_w, $orig_h, $width, $height, $crop);
        $dst_w = $dims[4];
        $dst_h = $dims[5];

        // Return the original image only if it exactly fits the needed measures.
        if (!$dims && (((null === $height && $orig_w == $width) xor (null === $width && $orig_h == $height)) xor ($height == $orig_h && $width == $orig_w))) {
            $img_url = $url;
            $dst_w = $orig_w;
            $dst_h = $orig_h;
        } else {
            // Use this to check if cropped image already exists, so we can return that instead.
            $suffix = "{$dst_w}x{$dst_h}";
            $dst_rel_path = str_replace('.' . $ext, '', $rel_path);
            $destfilename = "{$upload_dir}{$dst_rel_path}-{$suffix}.{$ext}";

            if (!$dims || (true == $crop && false == $upscale && ($dst_w < $width || $dst_h < $height))) {
                // Can't resize, so return false saying that the action to do could not be processed as planned.
                return false;
            } // Else check if cache exists.
            elseif (file_exists($destfilename) && getimagesize($destfilename)) {
                $img_url = "{$upload_url}{$dst_rel_path}-{$suffix}.{$ext}";
            } // Else, we resize the image and return the new resized image url.
            else {

                // Note: This pre-3.5 fallback check will edited out in subsequent version.
                if (function_exists('wp_get_image_editor')) {

                    $editor = wp_get_image_editor($img_path);

                    if (is_wp_error($editor) || is_wp_error($editor->resize($width, $height, $crop)))
                        return false;

                    $resized_file = $editor->save();

                    if (!is_wp_error($resized_file)) {
                        $resized_rel_path = str_replace($upload_dir, '', $resized_file['path']);
                        $img_url = $upload_url . $resized_rel_path;
                    } else {
                        return false;
                    }

                } else {

                    $resized_img_path = image_resize($img_path, $width, $height, $crop); // Fallback foo.
                    if (!is_wp_error($resized_img_path)) {
                        $resized_rel_path = str_replace($upload_dir, '', $resized_img_path);
                        $img_url = $upload_url . $resized_rel_path;
                    } else {
                        return false;
                    }

                }

            }
        }

        // Okay, leave the ship.
        if (true === $upscale) remove_filter('image_resize_dimensions', 'aq_upscale');

        // Return the output.
        if ($single) {
            // str return.
            $image = $img_url;
        } else {
            // array return.
            $image = array(
                0 => $img_url,
                1 => $dst_w,
                2 => $dst_h
            );
        }

        return $image;
    }
}


if (!function_exists('aq_upscale')) {
    function aq_upscale($default, $orig_w, $orig_h, $dest_w, $dest_h, $crop)
    {
        if (!$crop) return null; // Let the wordpress default function handle this.

        // Here is the point we allow to use larger image size than the original one.
        $aspect_ratio = $orig_w / $orig_h;
        $new_w = $dest_w;
        $new_h = $dest_h;

        if (!$new_w) {
            $new_w = intval($new_h * $aspect_ratio);
        }

        if (!$new_h) {
            $new_h = intval($new_w / $aspect_ratio);
        }

        $size_ratio = max($new_w / $orig_w, $new_h / $orig_h);

        $crop_w = round($new_w / $size_ratio);
        $crop_h = round($new_h / $size_ratio);

        $s_x = floor(($orig_w - $crop_w) / 2);
        $s_y = floor(($orig_h - $crop_h) / 2);

        return array(0, 0, (int)$s_x, (int)$s_y, (int)$new_w, (int)$new_h, (int)$crop_w, (int)$crop_h);
    }
}

?>